Put a fork in me

: : I want to know what exactly does the phrase "Put a fork in me...I'm done!" means and when would native English speakers normally use it, in which context?

: I've heard it used only to mean "I've finished talking," "That's all I have to say about that." ~rb

It's also used to indicate a losing cause. (When you cook meat, and it's "done," you stick a fork in it.) When a sports team, for example, is losing, and then losing badly so defeat seems inevitable, a commentator might say "stick a fork in them."